DS2155 datasheet(211/262 Pages) DALLAS

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DS2156

211 of 262

ERC

Error-Rate Control Register

EBh

Bit #

Name

WNOE

—

ER3

ER2

ER1

ER0

Default

Bits 0 to 3/Error-Insertion Rate Select Bits (ER0 to ER3)

ER3

ER2

ER1

ER0

Error Rate

No errors inserted

1 in 16

1 in 32

1 in 64

1 in 128

1 in 256

1 in 512

1 in 1024

1 in 2048

1 in 4096

1 in 8192

1 in 16,384

1 in 32,768

1 in 65,536

1 in 131,072

1 in 262,144

Bit 4/Constant Errors (CE). When this bit is set high (and the ER0 to ER3 bits are not set to 0000), the error-

insertion logic ignores the number-of-error registers (NOE1, NOE2) and generates errors constantly at the selected

insertion rate. When CE is set to 0, the NOEx registers determine how many errors are to be inserted.

Bits 5, 6/Unused, must be set to 0 for proper operation

Bit 7/Write NOE Registers (WNOE). If the host wishes to update to the NOEx registers, this bit must be toggled

from a 0 to a 1 after the host has already loaded the prescribed error count into the NOEx registers. The toggling of

this bit causes the error count loaded into the NOEx registers to be loaded into the error-insertion circuitry on the

next clock cycle. Subsequent updates require that the WNOE bit be set to 0 and then 1 once again.

DS2155 Datasheet(PDF) 211 Page - Dallas Semiconductor

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